It's probably my fave FF game. Got , a few expansions for it as well. Bloody thing takes up half a room, and there must be at least 20 decks of cards.
It's pretty close to Call of Cthulhu, investigating clues (used to close gates, or up your roles), adjusting your different attributes (which are linked in pairs- as you put one up, the other goes down. Nice bit of strategy there).
Frequent trips to Arkham sanitarium as you go insane. Bit more fighting than CoC proper, but if the Great Old One (GOO) wakes, you are generally screwed. There are quite a few GOO's that can come up, and they even effect the game while they are still sleeping. You have to close dimensional gates by traveling through them to seperate areas on the board. allow to many to open, or to many monsters out and the GOO wakes...
Lots of characters to choose from, shops and sites to visit. Lots of lovely (well...unlovely) monsters from Lovecraft and others.
I really recomend it, I don't get to play it half as much as i'd like!